Senior Threat Hunter

Leidos; Fort Huachuca (AZ); Hybrid; USD 108,000 - 195,000; Full time

Job summary

Leidos is seeking a Senior Threat Hunter to support DoD DoW operations at Fort Huachuca, AZ in a hybrid role (3 days on-site). You will lead incident response, proactively hunt threats across cloud and on-prem environments, and develop advanced detections and countermeasures.

A TS/SCI clearance is required, with broad experience in CSSP activities and DoDIN protection. Responsibilities include mentoring staff, delivering executive-level briefings, and collaborating with cross-functional teams to

Qualifications

• Bachelor's degree and 8+ years of relevant cybersecurity experience.
• 7+ years in cyber analysis, threat hunting, and/or purple/blue-team operations.
• Experience with U.S. Government CSSP environments.
• Proven record investigating sophisticated threats and improving detections.
• Tactics, techniques, and procedures (TTPs) knowledge for hunting and response.
• Experience in cloud and on-premises enterprise environments.
• Security+ and CSSP Analyst certifications, TS/SCI clearance.

Responsibilities

• Lead and support incident response during high-severity cyber incidents with actionable guidance.
• Conduct proactive threat hunting across cloud and on-prem subscriber environments.
• Identify adversary TTPs and develop countermeasures and detection logic.
• Build and tune AI-assisted detections and ML-based insights.
• Apply advanced tools to detect, analyze, and mitigate threats; integrate threat intel.
• Develop hypotheses from intelligence and emerging threats for detection improvements.
• Produce clear risk reports for technical teams and leadership.
• Collaborate with cybersecurity, IT, and network teams to strengthen security posture.
• Stay current on threats and translate intelligence into actions; deliver training.

Skills

Threat hunting

Incident response

Threat intelligence

Detection engineering

Cloud/on-prem detection

Technical leadership

Education

Bachelor's degree in cybersecurity

Tools

Security+

CSSP Analyst (CEH/GCIH)

Job description

The C5ISR Center Cyber Security Service Provider (CSSP) is a premier defensive cyber operations organization supporting the Department of War (DoW). Operating 24x7x365, our team provides continuous monitoring, threat detection, incident response, and vulnerability management across a diverse, multi-tenant subscriber environment. We protect cloud and on-premises environments—including AWS, Microsoft Azure, Google Cloud Platform (GCP), Oracle Cloud, and a broad range of SaaS platforms—supporting critical missions across multiple DoW services and agencies.

Leidos has an exciting career opportunity for a Senior Threat Hunter to support a large Department of War (DoW) Cyber Security Service Provider at Fort Huachuca, AZ. In this role, you will proactively identify, investigate, and mitigate sophisticated cyber threats across subscriber networks. You will apply deep knowledge of the cyber threat landscape to develop advanced detection strategies, test threat-hunting hypotheses, and identify and neutralize adversary activity targeting the Department of Defense Information Network (DoDIN). If you are an experienced cyber professional who thrives on solving complex problems and staying ahead of emerging threats, we want to hear from you.

Location: Hybrid 3 days on-site at Fort Huachuca

Clearance: U.S. citizenship and an active TS/SCI clearance.

Primary Responsibilities

• Lead and support incident response during high-severity cyber incidents, providing expert analysis and recommending appropriate containment, remediation, and recovery actions.
• Conduct proactive threat hunting across cloud and on-premises subscriber environments to identify and investigate malicious or suspicious activity before it causes mission impact.
• Identify adversary tactics, techniques, and procedures (TTPs) and develop countermeasures, including custom signatures, detection rules, and correlation logic.
• Build, tune, and monitor AI-assisted detections, including machine learning capabilities, to identify adversary behavior and movement within customer environments.
• Apply advanced cybersecurity tools and methodologies to detect, analyze, and mitigate cyber threats while integrating threat intelligence into sensing and detection infrastructure.
• Develop and refine threat-hunting hypotheses based on intelligence, emerging threats, anomalous activity, and known adversary behavior.
• Produce clear, actionable reports documenting findings, risk, and recommended remediation actions for technical teams, stakeholders, and senior leadership.
• Collaborate across cybersecurity, IT, and network teams to strengthen the security posture of subscriber systems and environments.
• Stay current on emerging threats, attack techniques, technologies, and industry trends, translating new intelligence into improved detection and response capabilities.
• Develop and deliver cybersecurity training for threat hunters, network defenders, and other relevant personnel to strengthen technical knowledge and incident response capabilities.
• Mentor team members and help foster a culture of technical excellence, continuous learning, collaboration, and improvement.
• Brief senior leaders, including SES and Flag Officer-level stakeholders, on cyber threat activity, significant incidents, and cybersecurity trends as needed.

Basic Qualifications

• Bachelor's degree and 8+ years of relevant cybersecurity experience.
• 7+ years of experience in cyber analysis, threat hunting, and/or purple-team or blue-team operations.
• Experience working for or with a U.S. Government Cyber Security Service Provider (CSSP).
• Demonstrated experience investigating sophisticated cyber threats and developing or improving threat detection capabilities.
• Working knowledge of adversary tactics, techniques, and procedures (TTPs) and their application to threat hunting, detection engineering, and incident response.
• Experience operating in complex enterprise environments that may include cloud, SaaS, and on-premises infrastructure.
• Ccertification requirements (e.g., Security+) and a CSSP Analyst certification (e.g., CEH, GCIH, or equivalent).
• Active TS/SCI security clearance.
• Excellent written, verbal, and interpersonal communication skills, including the ability to translate complex technical findings into clear, actionable information for technical and executive audiences.

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At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 - and moving faster than anyone else dares.

Original Posting and Pay Range

Original Posting: August 25, 2026

Pay Range: Pay Range $107,900.00 - $195,050.00 The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

Leidos Overview

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $17.2 billion for the fiscal year ended January2,2026. For more information, visit www.Leidos.com.

Pay and Benefits

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers.

• Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement.
• More details are available here.

Securing Your Data

Leidos will never ask you to provide payment-related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a Leidos.com email address. If you receive an email purporting to be from Leidos that asks for payment-related information or any other personal information, please report the email to [e-mail].

Commitment and Diversity

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.